#include "apue.h"
#include<sys/wait.h>

static void sig_int(int);

int main(void)
{
	char buf[MAXLINE];
	pid_t pid;
	int status;

    if(signal(SIGINT, sig_int) == SIG_ERR)
		err_sys("signal error");

	printf("%% ");
	while(fgets(buf, MAXLINE, stdin) != NULL) {
		if(buf[strlen(buf) -1] == '\n')
			buf[strlen(buf) - 1] = 0;

		if((pid = fork()) < 0)
			err_sys("fork error");
		else if(pid == 0) {    /* child process */
			execlp(buf, buf, (char *)0);
			err_ret("couldn't execute: %s", buf);
			exit(127);
		}

		/* parent process */
		if((pid = waitpid(pid, &status, 0)) < 0)
			err_sys("waitpid error");
		printf("%% ");
	}

	exit(0);
}

static void sig_int(int signo)
{
	printf("interrupt\n%% ");
}
